Wagon drill



Dec. 16, 1952 -r 2,621,896

WAGON DRILL Filed May 10, 1948 3 Sheets-Sheet l ALBERT FEUCHT JNVENTOR.

A{ FEUCHT WAGON DRILL Dec. 116, 1952 5 Sheets-Sheet 2 Filed May 10, 1948FIG FIG. 2

ALBERT FEUCHT INVENTOR.

Dec. 16, 1952 rg 2,621,896

WAGON DRILL Filed May 10, 1948 3 Sheets-Sheet 3 ALBERT FEUCHT INVENTOR.

ATI'ORIYEI Patented Dec. 16, 1952 WAGON DRILL Albert Feucht, Cleveland,Ohio, assignor to The Le Roi Company, Milwaukee, Wis., a corporation ofWisconsin Application May 10, 1948, Serial No. 26,121

Claims.

This invention relates broadly to rock drills, but more particularly toa drilling rig generally known in the art as wagon drill.

One object of this invention is to produce a wagon drill wherein therock drill or drilling motor is adapted to remain substantially over thewheels supporting its frame when moved within a wide range of differentdrilling positions, thereby maintaining the major weight of the drillingmotor and of its supporting structure within or above the supportingframe and preventing upsetting of the wagon drill as well asfacilitating its movement from one drilling location to another.

Another object of this invention is to produce such a wagon drillwherein the drilling motor is readily accessible and movement of theoperator about the drilling motor is not encumbered by supporting bracesas heretofore provided in drilling apparatus of this type.

Another object of this invention is to produce a wagon drill, whereinthe drilling motor may be moved into any desired position through asimple and efiicient mechanism requiring little effort on the part ofthe operator.

Other objects and advantages more or less ancillary to the foregoing andthe manner in which the various objects are attained, reside in thespecific construction and aggroupment of the elements peculiar to thisstructure, as will become apparent from a more complete examination ofthis specification, in the claims of which there are assembled certainspecific constructions indicative of the scope and spirit of theinvention.

In the drawings which illustrate the invention:

Figure 1 is a side elevational view of the wagon drill embodying theinvention. In this figure, the drilling apparatus is shown inperpendicular relation with its supporting frame.

Figure 2 is a view corresponding to Figure l but showing the drillingapparatus in substantially parallel relation with its supporting frameand located below the latter.

Figure 3 is a top plane view of the wagon drill with the drillingapparatus in the position shown in Figure 2.

Figure 4 is an enlarged sectional view taken through planes indicated byline l 44 in Fig-- ure 1.

Figure 5 is an enlarged sectional view taken through planes indicated byline 5-5-4 in Figure 1.

Figure 6 is an enlarged sectional view taken through a plane indicatedby line 66 in Figure 3.

Figure '7 is an enlarged cross sectional view taken through one sidemember of the supporting frame in a plane indicated by line 1-1 inFigure 1 and looking in the direction of the arrows. In this figure aportion of the housing has been broken away to show details ofconstruction.

Figure 8 is a view similar to Figure 4, shown in a somewhat reducedscale with portions of the mechanism broken away and extended toillustrate both sides of the main frame and the closed end of the drillsupporting frame.

Referring to the drawings in which like symbols designate correspondingparts throughout the several views, Ill represents the main frame of thewagon drill which is substantially U- shaped with two side members H andI2 united by a cross member I3. On the free end of each side member issecured a bracket M which operatively supports a frame carrying wheel[5. Also secured to the cross member I3 at equal distances from its endsis a bracket l6 which operatively supports a caster wheel I! and ahandle l8.

Carried by the main frame for movement relatlve thereto as willhereinafter be explained, there is a substantially rectangular drillsupporting frame 9 which includes two parallel side members I9 and 20united at one end by a cross member 2!, which members, like those of themain frame, are preferably made of tubing sections welded together. Thedrill supporting frame is narrower than the main frame and made to passfreely through the open end and between the side members of the latter.As shown in Figure 8, the other end of the drill supporting frame isalso closed by a tubular cross member 22 which is welded to the end ofthe side members l9 and 20 and extends beyond them to end substantiallyabove the side members H and E2 of the main frame where the ends of thecross member 22 are carried through two identical connections, one ofwhich is clearly shown in Figure 4. As part of these connections, eachend of the cross member 22 is accurately machined to form a shaftedportion 23, ended by a flange 24, which portion is rotatably supportedwithin the head 25 of a bracket 26. Integral with the brackets head 25,there are two longitudinally spaced substantially U-shaped clamps 21which straddle the side members of the main frame. Each clamp 21 carriesa cross pin on short shaft 28 on which is rotatably mounted a roller 29for engagement with the underside portion of the side members of themain frame in. Above the center axis of the drill supporting frame crossmember 22, the brackets head 25 is provided with a semi-circularinwardly tapered seat 33 which extends about 30 on each side thevertical passing through its longitudinal axis. Thereafter the taperedseat is cut-off to provide a recessed semicircular flat portion 3|,which portion as seen in Figures 4 and 8 is located primarily below thecenter axis of the drill supporting frame cross member 22 while the seat30 is located above it. Engaging the tapered seat 36, there is arelatively thick correspondingly tapered washer 32 which has its innerend wall provided with a raised portion or step 33 engaging the flatportion 3| of the brackets head 25. The distance between the center axisof the tapered seat 38 and that of the rollers 29 is calculated to causethe washer 32 to engage the upper portion of the side member of the mainframe while the rollers engage the under portion thereof. Extendingthrough the drill supporting frame cross member 22 as well as throughthe brackets head 25 and washers 32, there is a long bolt 34 having itshead resting against the outer wall of one of the washers 32 betweenstops 35 provided thereon to prevent its rotation. The free end of thebolt is adapted to receive a nut 36 which has a cylindrical shoulder 31resting against the other washer 32 between its stops 35'.

Intermediate its ends but closer to the cross member 22 than the crossmember 2|, each side member l9 and 20 of-the drill supporting frame hasrigidly secured thereto a trunnion 38 which extends laterally andoutwardly relative to said frame and has pivotally mounted thereon onecorner 39 of a bell crank brace or lever 40 through which the drillsupporting the frame may be raised or lowered relative to the main framel as will be hereinafter explained.

Rigidly secured to each side members II and I2 of the main frame I!) butcloser to its open than its closed end, there is a trunnion 4| locatedbelow the side members H and I2 and extending laterally and inwardlyrelative to the main frame in parallel with the trunnions 38. On eachtrunnion 4| is pivotally mounted the second corner 42 of the bell cranklever 46.

The third corner 43 of each bell crank lever 40 is also equipped withapivotal connection which may broadly be referred to as a trunnion 44which is parallel to the other two but extends outwardly from the lever46 to end above the side members of the main frame as clearly shown inFigure 5. On each trunnion 44 there is mounted a spacer 45 held inposition by a washer 46 and nut 41, on which spacer is pivotally mountedthe clevis end 48 of a relatively long stationary screw 49 secured tothe clevis 48 by a set screw 53.

The screw 49, for the major portion of its length, is covered by a tubealso secured to the clevis 48 by the set screw 50. Mounted on the screw49 in operative engagement therewith, there is a cylindrical nut 52having welded thereto one end of a torsion tube 53, which is free torotate and move longitudinally over the screw 49 and within the tube 5|to form therewith a telescopic cover or seal for the screw. The torsiontube 53 extends through the free end of the tube 5| and has welded orotherwise affixed to its other end a journal 54.

Near the closed end of the main frame |0, each side member thereof haswelded thereto an upwardly extending bracket 55 which has pivotallysecured to the upper end thereof by a bolt 56 a worm and gear housingassembly 51. As shown in Figure 6, the housing 5'! operatively carriestwo spaced ball bearings 58 in which the journal 54 or end portion ofthe torsion tube 53 is rotatably supported. Between the two bearings 58the journal 54 carries a worm gear 59 rigidly secured thereto by a key60, which gear is in mesh with a Worm 6| rotatably mounted within ballbearings 62 accommodated within the upper end of the housing 51. Eachworm 6| extends transversally of the main frame I!) and has its innerend extending through the housing 51 as clearly shown in Figure 3 andFigure 7 and are rigidly connected to each other by a connecting rod orshaft 63. The outer end of the worm 6| also eX- tends through thehousing 51 but outside of the main frame l0 where it is appropriatelyshaped to receive a handle 64 through which the worms 6| may be rotatedmanually.

Secured to the cross member 2| of the drill supporting frame by aconventional saddle 65, there is a boom or drill guiding frame 66 onwhich is slidably mounted the fluid actuated drill 61 and drill steel 68extending from the front end thereof. Since the saddle 65, drill guidingframe 66 and drill 61 form no part of this invention, no furtherdescription is thought necessary other than pointing out that theconventional saddle 65 affords a connection between the drill carryingframe and drill guiding frame whereby the former may be moved andsecured in about any desired position relative to the latter. It is alsoto be understood that in constructions of this type, the drill guidingframe 66 accommodates a feeding mechanism through which th drill 61 maybe power fed in both directions on the frame 66.

In the operation of this improved wagon drill, it will now be understoodthat the drill carrying frame which includes the two side members l9 and20 may rigidly be secured to the main frame H], by tightening the nut 36(Figures 4 and 8) in the bolt 34 and causing the washers 32 to be forcedinwardly on the taper seats 30 of the brackets 25. The hole through eachwasher is made large enough to enable lateral movement of the washerrelative to the bolt 34. Since the inward movement of each washer islimited by the engagement of its shoulder 33 with the flat portion 3| ofthe brackets head 25, further inward axial pressure exerted on thewashers by the tightening of the nut 36 will cause the taper seats 30,cooperating with the tapered sides of the washers, to act as cams fordriving the washers downwardly into engagement with the upper wall ofthe side members of the main frame. This downward movement of thewashers will result in each bracket 26 being clamped on itscorresponding side member of the main frame between the washer 32 andthe rollers 29, thereby preventing longitudinal movement of the drillsupporting frame relative to the main frame. Once the Washers 32 are inclamping relation with the side members of the main frame, furthertightening of the nut 36 will cause clamping engagement of the washerswith the taper seats 30 to prevent pivotal movement of the drillsupporting frame relative to the main frame. Thus it will be understoodthat through the simple manipulation of one single nut, the drillsupporting frame may be locked to the main frame against both pivotaland longitudinal movements relative thereto.

In order to facilitate longitudinal movement of the drill supportingframe relative to the main frame, each bracket 26 has been provided withtwo rollers 29 in operative engagement with the under side of the sidemembers of the main frame. Because of the location of the connectionsbetween the supporting frame side members l9 and 20 with the bell cranklevers 40 together with the relatively heavy weight of the drill guidingframe 66 and drill 61 carried by the cross member 2|, when the nut 36 isloosened the drill guiding frame will tend to cause upward movement ofthe brackets 25 relative to the main frame, which upward movement ischecked by the rollers 29 engaging the undersides of the side members Il and [2 of the main frame without hindering the longitudinal movementof the drill supporting frame relative to the main frame.

The pivotal and longitudinal movements of the drill supporting framerelative to the main frame is effected concurrently by manually rotatingthe crank or handle (54 for imparting rotation to the two worms 6!connected to each other by the connecting rod 63. From the worms 6!rotation is imparted to the two worm gears 59 at the same rate of speedand therefrom transmitted to the nuts 52 through the journals 54 andtorsion tubes 53. Since the nuts 52 are in operative engagement with thestationary screws 49, their rotation will effect either expansion orretraction of the telescoping tubes 5! and 53 and the consequentialpivotal movement of the bell crank levers 49 on their pivots 32 throughwhich the levers are connected to the main frame It. This pivotalmovement of the bell crank levers will cause one end of the drillsupporting frame to slide on the main frame while its other end, that isthe end carrying the drill guiding frame 66, moves up or down within onesubstantially vertical plane passing through the center axis of thewheels l5.

Should it be desired to move the drill guiding frame 66 from theposition shown in Figure 1 to that shown in Figure 2, after the nut 35has been loosened, the crank 64 would be rotated to impart pivotalmovement to the bell crank levers 46 around the pivots 42 in a clockwisedirection in Figure 1. In this instance, this rotation would be effectedby a retraction of the telescopic braces between the brackets 55 and thecorners 43 of the levers 40. Because of this pivotal movement of thebell crank levers Ml, the lower end of the drill supporting frame(Figure 1) will slide on the side members H and I2 of the main frame Ill toward the brackets 55, while the upper end of the drill supportingframe will be moved below the side members I! and I2, enabling the drillguiding frame 85, which had previously been shifted from a vertical toan horizontal position, to be located close to the ground as clearlyshown in Figure 2.

It is an important feature of this invention to locate the pivot 42 ofthe bell crank levers 40 on the main frame H! to assure, together withthe length of the sides of the bell crank levers and the length of thesupporting frame, position of the drill guiding frame or its center ofgravity substantially above the axis of the wheels l5. Through the bellcrank levers and their appcrtinent connections, the drill guiding frame66 may be moved up and down relative to the main frame Ill whileremaining substantially above the center axis of the wheels [5, therebyenabling adjustment of the drill guiding frame to any desired drillingposition without danger of upsetting the entire wagon drill.Furthermore, since the center of gravity of the drill guiding frameremains substantially above the wheels l5, the entire wagon drill canreadily be moved from one drilling location to another.

Although the foregoing description is necessarily of a detailedcharacter, in order to completely set forth the invention, it is to beunderstood that the specific terminology is not intended to berestrictive or confining and it is to be further understood that variousrearrangement of parts and modification of structural detail may beresorted to without departing from the scope or spirit of the inventionas herein claimed.

I claim:

1. In a wagon drill, a wheel supported main frame, a drill supportingframe, connecting means between said frames including a connectingelement slidable on said main frame and a pivot between said element anddrill supporting frame enabling concurrent longitudinal and pivotalmovements of the drill supporting frame relative to the main frame, abell crank lever, a first pivotal connection between said lever and mainframe, a second pivotal connection between said lever and drillsupporting frame, a gear mechanism carried by said main frame, a. pairof screw threaded telescopic elements extending from said mechanismtoward said lever, connecting means between one of said elements andmechanism capable upon operation of the latter of imparting rotation tothe former for effecting telescopic motion of said elements, and a thirdpivotal connection between said lever and the other of said elements,said lever and connections being arranged and disposed in a mannereffecting said concurrent movements upon tele scopic motion of saidelements.

2. In a wagon drill, a wheel supported main frame, a drill supportingframe, connecting means between said frames including a connectingelement slidable on said main frame and a pivot between said element anddrill supporting frame enabling concurrent longitudinal and pivotalmovements of the drill supporting frame relative to the main frame, abell crank lever, a first pivotal connection between said lever and mainframe, a second pivotal connection between said lever and drillsupporting frame, a rotation imparting mechanism carried by said mainframe, a pair of screw threaded elementsextending from said mechanismtoward said lever telescopically movable upon rotation of one elementrelative to the other, rotation transmitting means between saidmechanism and said one element, and a third pivotal connection betweensaid lever and the other of said elements, said first pivotal connectionbeing fixed on said main frame to cause pivotal movement of said leverthereon upon telescopic motion of said elements, said concurrentmovements being effected by virtue of said second pivotal connection andthe pivotal movement of said lever.

3. In a wagon drill, a main frame formed with an open end, supportingwheels for said frame adjacent the open end thereof, a drill supportingframe carried by said main frame, connecting means between said framesenabling one end of said drill supporting frame to be raised and loweredrelative to said main frame substantially within a vertical planepassing through the center axis of said wheels, including a connectingelement slidable on the main frame and a pivot between said element anddrill supporting frame, a bell crank lever having a first pivotalconnec- 7, tion; with; saidmain: frame and a second one with:said' drillsupporting frame, said lever being pivotable by virtue of said'firstconnection for effecting movements of the end of said drill guildingframe within said vertical plane, a rotation impartingimechanism carriedby said main frame, a pairofscrew. threaded elements extending from saidmechanism toward said lever telescopi'cally movable upon rotation of oneelement relative to1the other, rotation transmitting meansbetween'sa-idmechanism and said one element, and a'thirdpivotalconnection between said lever andthe other" of .said elements foreffecting pivotal movement of said lever upon telescopic movement ofsaid elements.

4. In a wagondrill, a substantially U-shaped mainframe, supportingwheels for said frame adjacent the open end thereof, a secondary framecarried by said main frame having a drill supporting end, a connectingelement slidable on said main frame and a pivot between said element andsecondary frame enabling concur,- rent longitudinal and pivotalmovements of said drill supporting end through the open end of. saidmain frame, a trunnion carried by said main frame between the open endthereof and,

said connecting element, a bell crank lever pivotally carried by saidtrunnion, a pivotal connection between said lever and secondary frameadapted to swing around said trunnion during pivotal movement of saidlever for effecting said concurrent longitudinal and pivotal movements,a rotationimparting mechanism carried by said main frame near the closedend thereof, and

means connected to said lever and mechanism having rotation impartedthereto from the latter for effecting pivotal movement of the former.

5. In a wagon drill, a wheel supported main frame, a drill supportingframe, connecting means between said frames including a connectingelement slidable on said main frame and a pivot between said element anddrill supporting frame enabling longitudinal and pivotal movements ofthe latter frame relative to the main frame, a bell crank leverpivotall'y-connected to said main frame, a pivotal connection betweensaid'lcver and drill supporting frame whereby pivotal movement ofsaidlever on said main frame effects longitudinal and pivotal movementsof said d'rill supporting frame, a rotation imparting mechanism carriedby said main-frame, a pair of screw threaded elements extending fromsaid mechanism toward said lever telescopically movable upon rotation ofone element relative-to the other; rotation transmitting meansbetweensaid mechanism and said one element, another pivotal connectionbetween said lever and'the other of saidelements effecting: pivotalmovement of said lever 'upon telescopic movement of said elements, andlocking means carried by said connecting element operable for preventinglongitudinal and pivotal'movements of saiddrill supporting frame.

ALBERT FEUCHT.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,444,056 Billingset al. -Feb'.6, 1923 2,044,878 Curtis June 23, 1936 2,104,341 Curtis Jan. 4, 19382,165,853 Hart July 11, 1939 2,217,674 Curtis, Oct. 15, 1940 2,310,284Gurries Feb. 9, .1943 2,316,672 Curtis et a1; Apr. 13,. 1943 2,345,620Mork .Apr. 4, 1944 2,365,176 Curtis Dec. 19, 1944 2,453,204 Dobbs Nov;9,- 1948 2,472,223 McElhinney et al. June 7, 1949 FOREIGN PATENTS NumberCountry Date 741,863 France, Dec.v 20, 1932

